Results 71 to 80 of about 231,491 (215)

Growth performance and RNA/DNA ratio of noble crayfish (Astacus astacus) and narrow‐clawed crayfish (Pontastacus leptodactylus) fed fish waste diets

Aquaculture Research, 2020
New and viable species for aquaponics and integrated multi‐trophic aquaculture (IMTA) in freshwater systems can improve yields and sustainability of aquaculture.
Tanja Yvonne Roessler, Andrea Wirtz, M. Slater, Joachim Henjes   +3 more
semanticscholar   +1 more source

First European Interlaboratory Ring Test Study to Detect DNA of Crayfish and the Crayfish Plague Pathogen From Water Samples

Environmental DNA, Volume 8, Issue 1, January–February 2026.
This European interlaboratory ring test highlights how methodological differences affect eDNA‐based detection of crayfish and the crayfish plague pathogen, emphasizing the need for harmonized protocols to improve reliability in conservation and disease monitoring efforts.
Patrik Bohman, Kristofer Andersson, David A. Strand, Thomas Baudry, Kathrin Theissinger, Ivana Maguire, Michael Aluma, Anna Aspán, Martin Bláha, Ljudevit Luka Bostjancic, Carine Delaunay, Javier Diéguez‐Uribeondo, Lennart Edsman, Fabio Ercoli, Jean‐Yves Georges, Frédéric Grandjean, Bogna Griffin, Terhi Iso‐Touru, Birgitta Jacobsson, Katrin Kaldre, Alex King, Pavel Kozák, Lucija Markulin, María Martínez‐Ríos, Laura Martín‐Torrijos, Saima Mohammad, Michaela Mojžišová, Teja Petra Muha, Ludvig Orsén, John Persson, Simone Roberto Rolando Pisano, Lilian Pukk, Björn Rogell, Timo J. Ruokonen, Heike Schmidt‐Posthaus, Jonas Steiner, Linda Söderberg, Anti Vasemägi, Armin Zenker, Adam Petrusek   +39 more
wiley   +1 more source

Density and yield of the noble crayfish Astacus astacus in the River Skotsbergelva, SE Norway

Fauna Norvegica, 1990
The population density and yield of the noble crayfish Astacus astacus was estimated on two localities in the River Skotsbergelva in the Halden river system, SE Norway, in August 1989.
Leif Asbjørn Vollestad, Børre Kind Dervo   +1 more
doaj   +1 more source

Diet‐manipulated body condition affects onset and speed of moult in common bulbuls in a tropical environment

Journal of Avian Biology, Volume 2026, Issue 1, January 2026.
Resource acquisition and allocation are central to life history theory, explaining the diversity of strategies among species as well as the distribution of events over the annual cycle. Moult is a major phase in the annual cycle of birds, but explanations for moult scheduling are heavily biased towards temperate systems with seasonal breeding patterns.
Yahkat Barshep, Kwanye Zira Bitrus, B. Irene Tieleman, Chima Josiah Nwaogu   +3 more
wiley   +1 more source

Distribution and dispersal of two invasive crayfish species in the Drava River basin, Croatia [PDF]

Knowledge and Management of Aquatic Ecosystems, 2009
The aim of this work is to explore the current distribution and dispersal rates of two nonindigenous crayfish species (NICS) recorded in Croatia: the signal crayfish (Pacifastacus leniusculus) and spiny-cheek crayfish(Orconectes limosus).
S. Hudina, M. Faller, A. Lucić, G. Klobučar, I. Maguire   +4 more
doaj  

ROUNDTABLE - SESSION 2 EXPLOITATION, CONSERVATION AND LEGISLATION

Knowledge and Management of Aquatic Ecosystems, 2004
The link between socioeconomics and conservation and the role of legislation in conservation work was discussed in the group with participants from nine European countries. Interest and knowledge among the general public, stakeholders and managers is the
EDSMAN L., SMIETANA P.
doaj   +1 more source

Lake Hańcza – a new site for signal crayfish (Pacifastacus leniusculus Dana) occurrence in Poland

Archives of Polish Fisheries, 2018
Crayfish catches were conducted using traps in Lake Hańcza, which is the deepest lake in Poland. Two crayfish populations were found to co-exist in the lake: spiny-cheek crayfish (Orconectes limosus Raf.) and signal crayfish (Pacifastacus leniusculus ...
Ulikowski Dariusz, Chybowski Łucjan
doaj   +1 more source

Contemporary Evolution of an At‐Risk Stickleback Population During a Severe Drought

Evolutionary Applications, Volume 19, Issue 1, January 2026.
ABSTRACT Populations can be granted conservation status because they harbour a set of unique traits, evolutionary histories, or ecological roles. Such populations are often isolated and specialised and, as such, can be particularly vulnerable to environmental disturbances.
Sarah Sanderson, Lucas Eckert, Rowan D. H. Barrett, Thomas E. Reimchen, Andrew P. Hendry   +4 more
wiley   +1 more source

Evidence for Asian Swamp Eels as an Emerging Threat to Everglades Amphibians

Freshwater Biology, Volume 71, Issue 1, January 2026.
ABSTRACT As amphibian populations around the globe continue to shrink and suffer enigmatic declines, it is critical to use systematic studies to isolate causes and provide management targets for key environmental variables. We sampled the amphibian community at 30 sites dispersed across four large regions of the Everglades (FL, USA).
Hunter J. Howell, Sierra N. Thomasset, Leila M. Thompson, Mark I. Cook, Eric A. Cline, Nathan J. Dorn, Christopher A. Searcy   +6 more
wiley   +1 more source

ANNUAL ACTIVITY OF THE NOBLE CRAYFISH (ASTACUS ASTACUS) IN THE ORLJAVA RIVER (CROATIA) [PDF]

Bulletin Français de la Pêche et de la Pisciculture, 2006
We studied the annual activity of the noble crayfish (Astacus astacus) at three sites along the Orljava River, in the continental part of Croatia, between August 2003 and September 2004. Each site represented the typical characteristics of the upper, middle and lower section of the river (5, 30 and 50 km from the spring, respectively).
FALLER M., MAGUIRE I., KLOBUČAR G.
openaire   +4 more sources